From now on whenever I see four women in a boat I am gonna assume this is what they are planning on doing just as soon as they reach a secluded cove:

vintage postcard of four women stripping nude and diving out of a boat to go swimming naked

Update: Commenter Hug has offered links leading to a nice color version of this artwork by Harald Slott-Møller:

nude women bathing as painted by Harald Slott-Møller

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